a creep meter uses a wire stretched across a fault to measure horizontal movement of the ground
on one side of the fault, the wire is attached to a post and on the other side the wire is attached to a weight that can easily slide if the fault moves
Laser-Ranging Devices
a laser-ranging device uses a laser beam to detect any slight movements caused from the fault
this device calculates any change in the time needed for the laser beam to travel to a reflector and bounce back thus the device can detect any change in distance to the reflector
Tiltmeters
a tiltmeter measures now much the ground has tilted
if the land tilts, the water in the bulbs tilts to the side the land is leaning towards
Satellite Monitors
instead of using all ground monitors geologists tried using satellite monitors as a choice as well
the satellite bounces radio waves off the ground and as the waves come back the satellite record them
Monitoring Risk in the United States
Even with the good data we have, geologists can't predict where the earthquake will strike
The risk of earthquakes are high where the Pacific and The north American plates meet
Table of Contents
2.4 Monitoring Faults
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Outline
Devices that Monitor Faults
Monitoring Risk in the United States
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